#include<stdio.h>

int const b = 10;
int main(int argc , char *argv[]){
    
    int const a = 10;

    int *p = (int *)&a;

    *p = 20;
    
    int *q = (int *)&b;

//    *q = 20;
    printf("a=%d,*p=%d\n", a,*p);
    return 0;
}
